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The strengthening relationship between A rctic O scillation and ENSO after the mid‐1990s
Author(s) -
Li Fei,
Wang Huijun,
Liu Jiping
Publication year - 2014
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.3828
Subject(s) - climatology , extratropical cyclone , arctic oscillation , el niño southern oscillation , northern hemisphere , environmental science , the arctic , pacific decadal oscillation , arctic , multivariate enso index , southern oscillation , oceanography , geology
ABSTRACT The Arctic Oscillation ( AO ) and ENSO have dominant influences on the extratropical and tropical climate variabilities in the Northern Hemisphere, respectively. In this paper, we document a strengthening of the AO–ENSO relationship in January after the mid‐1990s, when the interannual variability of the previous September Arctic sea ice cover ( ASIC ) had consistently increased, by analyzing the AO, ENSO, and associated atmosphere–ocean variability. Our analysis further suggests that the larger ASIC interannual variability may account for the larger scale wave train across the Pacific basin, and the AO is strongly coupled to the circulation in the North Pacific. The strengthened connection between the − AO and Aleutian Low ( AL ) may contribute to the identified closer relationship between the − AO and ENSO .